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Finding the Third Proportional to 6,138 and 6,691.50

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Solution

The third proportional to 6,138 and 6,691.50 is: 7,294.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,138 : 6,691.50 = 6,691.50 : x
  2. Step 2: Convert to fraction form
    6,138/6,691.50 = 6,691.50/x
  3. Step 3: Cross multiply
    6,138x = 6,691.50 × 6,691.50
  4. Step 4: Simplify right side
    6,138x = 44,776,172.25
  5. Step 5: Solve for x
    x = 44,776,172.25/6,138
  6. Step 6: Final answer
    x = 7,294.91

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.